I did find the below in a report from Micronesia.

______________________________________

Vitamin A results
The retinol content ranged from 3200 =C2=B5g/100g in the lidoi parrot
fish to 204,012 =C2=B5g/100g in the yellowfin tuna liver. A 60-gram
portion (about 3 tablespoons), which was the average weight for the
yellowfin tuna liver for the sample, would provide over 200 times the
daily estimated requirements of a non-pregnant, non-breastfeeding woman.

______________________________________

I do not know where the toxic effects start to show up, but a single 3
tablespoon serving of yellowfn tuna liver would require you to swallow
200 vitamin pills containing one recommended daily dose of Vitamin A to
equal the A in the tuna liver.

My mailbox is always full to avoid spam. To contact me, erase
from my email address. Then add . I do not
check this box every day, so post if you need a quick response.